Unified Interior Regions

Hawaii

The Pacific Region has nine USGS Science Centers in California, Nevada, and Hawaii. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

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Filter Total Items: 68
Date published: July 5, 2016
Status: Active

Monitoring Hawaiian Biodiversity: Changes to forest birds and their habitat

Hawaiian forests are beset by many stressors, resulting in a complex pattern of altered ecosystems, impeirled species, and (in some areas) substantial protection and restoration. Short-term studies focused on specific sites or biota have limited value in understanding landscape-level change. Long-term and spatialy extensive data are needed to understand how ecosystems are reacting to both...

Date published: May 13, 2016
Status: Active

Restoration Ecology

Restoration of ecological systems in wildland areas often involves restoring species to habitats degraded by invasive plant and animal species.  Often, such invasive species exert community level impacts, such as direct competition, but may also alter ecosystem function. For example, invasive plants have been documented to alter fire regimes, soil nutrients and microbes, food webs, and/or...

Date published: May 11, 2016
Status: Active

Status and Trends of Hawaiian Flora and Fauna

Hawai‘i has more endangered species than any other state - over 394 species.  In spite of this fact, there is not a central clearing house for information on the status and trends of these species.  Information is spread over the following areas:

1. USGS maintains some information on Forest Birds.

2. USFWS maintains summary data on listed and proposed plants.

3. The...

Date published: May 11, 2016
Status: Completed

Dynamics of a Koa Looper Moth Outbreak and Response by the Native Forest Community

A massive outbreak of the native koa looper moth (Scotorythra paludicola; Geometridae) defoliated more than a third of the koa (Acacia koa) forest on Hawai‘i Island during 2013–2014. Our objective was to record the dynamics of the koa looper (Scotorythra paludicola) outbreak and evaluate the response to the outbreak by the forest ecosystem generally as well as select native and invasive...

Date published: April 26, 2016
Status: Active

Webinar: Recreational Seascapes: Integrating Human and Mechanical Observations on Hawaiʻi Island

View this webinar to learn how scientists explored how people on the seascape experienced climate and environmental changes in Hawai'i.

Contacts: Noelani Puniwai
Date published: April 17, 2016
Status: Active

Development of an Environmental Assessment and Eradication Plan to Remove Tilapia from Ponds and Wetlands in National Parks on the Island of Hawai’i

Mozambique tilapia, a highly invasive non-native fish of the family Cichlidae, were discovered in a wetland in Kaloko-Honokohau National Historical Park on the Big Island of Hawai'i. As the U.S. National Park Service works to restore the natural communities and functions of wetland ecosystems on the island, the eradication of the tilapia population is considered necessary to fully achieve...

Contacts: Leo Nico, Ph.D.
Date published: April 13, 2016

Understanding Coastal Change

Scientists perform a range of studies that document, assess, and model coastal change, risk, and vulnerability. Studies include historical shoreline change, the geologic structure and history of coastal regions, sediment supply and transport, sea-level rise, and how extreme storm events affect rates and impacts of coastal change.

Date published: April 13, 2016

Geologic Hazards and Catastrophic Events

We study the distribution and hazard potential of coastal and submarine events such as earthquakes and submarine landslides and associated tsunami potential, hurricane induced coastal inundation, extreme storms, sea-level rise and oil and gas spills. We also model development to help evaluate and forecast coastal hazard probability and occurrence.

Date published: April 13, 2016

Ocean Resources for America's Needs

Our scientists conduct research studies focused on geologic mapping, sampling and understanding of mineral and energy resources and studies of the geologic setting and processes to inform renewable energy development offshore.

Date published: April 13, 2016

Coastal and Marine Ecosystem Science

We bring together multidisciplinary expertise focused on developing tools and models to improve understanding of how healthy ecosystems function as well as how they respond to environmental changes and human impacts including ecosystem restoration. Research studies address coral reef, coastal wetland, benthic habitat and groundwater resources.

Date published: March 17, 2016

Volcano Hazards Assessments Help Mitigate Disasters

The Volcano Hazards Program develops long-range volcano hazards assessments. These includes a summary of the specific hazards, their impact areas, and a map showing ground-hazard zones. The assessments are also critical for planning long-term land-use and effective emergency-response measures, especially when a volcano begins to show signs of unrest.

Date published: March 9, 2016

Pacific Island Ecosystems Research Center

We work with others to provide scientific understanding and technologies needed to support and implement sound management and conservation of our Nation's biological resources in Hawaii and other Pacific island locations.

Filter Total Items: 89
Date published: December 21, 2016

Digital image mosaics of the nearshore coastal waters of selected areas on the Hawaiian Islands of Hawai‘i, Maui, Moloka‘i, and O‘ahu generated using aerial photographs and SHOALS airborne lidar bathymetry data

USGS has the capability to compile digital image mosaics that are useful for creating detailed map products. Image maps covering the shallow near-shore coastal waters have been produced for several of the main Hawaiian Islands, including Hawai‘i, Maui, Moloka‘i, and O‘ahu and are presented in JPEG2000 (.jp2) format.

Date published: June 15, 2016

Hawaiʻi Rainfall--current conditions

Continuously recording rainfall sites utilize equipment that automatically record and store the amount of rainfall at specific intervals. Many sites are equipped with telemetry so that information can be electronically transmitted and displayed on the internet in real time.

Date published: June 15, 2016

Hawaiʻi Water Quality--current conditions

Suspended-sediment concentrations are determined from samples collected by an autosampler or collected manually.

Date published: June 15, 2016

Hawaiʻi Groundwater--current conditions

At some sites, groundwater levels in wells are manually measured, using steel or electrical tapes or pressure transducers. Other sites utilize electronic equipment to record and store the water levels at specific intervals. Some sites are equipped with telemetry so that information can be electronically transmitted and displayed in real-time on the internet.

Date published: June 15, 2016

Hawaiʻi Streamflow--current conditions

Continuously recording surface-water stations are stations with equipment that automatically record and store data at specific intervals. Many stations are equipped with telemetry so that information can be electronically transmitted and displayed on the internet in real time.

Date published: April 20, 2016

Structures Data

USGS data portray selected structures data, including the location and characteristics of manmade facilities. Characteristics consist of a structure's physical form (footprint), function, name, location, and detailed information about the structure. The types of structures collected are largely determined by the needs of the disaster planning and response and homeland security organizations....

Date published: April 19, 2016

The United States Interagency Elevation Inventory (USIEI)

The USIEI is a comprehensive, nationwide listing of known high-accuracy topographic and bathymetric data for the United States and its territories. The project is a collaborative effort of the USGS and NOAA with contributions from other federal agencies. The inventory supports the 3D Elevation Program and the Integrated Ocean and Coastal Mapping effort. This resource is updated in Spring and...

Date published: April 19, 2016

Elevation Data

The 3DEP products and services available through The National Map consist of lidar point clouds (LPC), standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

Date published: April 12, 2016

Orthoimagery Data

Orthoimagery data typically are high resolution aerial images that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a planimetric map. The National Map offers public domain, 1-meter orthoimagery for the conterminous United States with many urban areas and other locations at 2-foot or finer resolution.

Date published: April 12, 2016

The National Map Small-Scale Collection

The National Map offers a collection of small-scale datasets, most of which are at 1:1,000,000. The National Map publishes two data collections at one million-scale: one for Global Map users and one for National Map users. In terms of vector geometry, the lines, points, and areas in these data collections are identical. The difference is in the attributes assigned to these features.

Filter Total Items: 366
Color map showing lava lake thickness
December 22, 2020

Kīlauea summit eruption lava lake depth map generated from December 22, 2020 imagery

Map of volcano summit activity
December 22, 2020

Kīlauea summit eruption reference map showing the location of current and previous lake activity

Color interferogram showing volcano deformation
December 22, 2020

This “interferogram” was created from satellite radar data acquired over Kīlauea Volcano on December 6 and 21 (at 6 PM HST each day). The colored fringes show ground deformation that occurred during that 15-day period. Each fringe is equivalent to about 1.55 cm (0.6 in) of ground deformation towards or away from the satellite.

Map of lava lake depth
December 22, 2020

Kīlauea summit eruption lava lake depth map generated from December 21, 2020 imagery

Color thermal map of volcano summit and lava lake
December 22, 2020

December 21, 2020—Kīlauea summit eruption thermal map constructed from aerial imagery

Color map depicting lava flow thickness
November 23, 2020

Final map of Kīlauea 2018 lower East Rift Zone lava flow thicknesses

The September 23, 2020, overflight provided aerial photos of Kīlauea's summit that were used to construct an updated map. Poor w
September 25, 2020

The September 23, 2020, overflight provided aerial photos of Kīlauea's summit that were used to construct an updated map.

Color map of camera network coverage
September 20, 2020

Map of the USGS Hawaiian Volcano Observatory’s current camera network coverage. 

Color graphic showing Mauna Loa historical lava flows, hazard zones, and county districts
June 5, 2020

Map showing the subaerial extents of historical lava flows from Mauna Loa. Lava flow hazard zones and districts of the County of Hawai‘i are also depicted.

thermal map shows relative surface temperatures across Kīlauea's 2018 lower East Rift Zone lava flow field.
August 31, 2019

This preliminary thermal map shows relative surface temperatures across Kīlauea's 2018 lower East Rift Zone lava flow field.

Thermal map of Kīlauea summit
August 22, 2019

This thermal map was constructed from 1008 images collected by a thermal camera during a helicopter overflight on August 22, 2019.

Thermal map of Kīlauea Caldera
April 8, 2019

This thermal map, which was constructed by merging about 1300 images from a morning helicopter overflight on April 8, shows the distribution of some prominent thermal features in Kīlauea's summit caldera. 

Filter Total Items: 116
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Year Published: 2010

Streamflow, suspended-sediment, and soil-erosion data from Kaulana and Hakioawa watersheds, Kaho'olawe, Hawai'i,

Various events over the last two centuries have destroyed the vegetation and caused rapid soil erosion on large areas of the small, arid, windy tropical shield-volcano island of Kaho`olawe, Hawai`i. These activities were largely halted in the 1990s, and efforts have been made to restore the island's vegetation in order to stem erosion. In 2003,...

Izuka, Scot K.; Abbott, Lyman L.
Streamflow, suspended-sediment, and soil-erosion data from Kaulana and Hakioawa watersheds, Kaho'olawe, Hawai'i,; 2010; OFR; 2010-1182; Izuka, Scot K.; Abbott, Lyman L.

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Year Published: 2010

Hawaii StreamStats; a web application for defining drainage-basin characteristics and estimating peak-streamflow statistics

Reliable estimates of the magnitude and frequency of floods are necessary for the safe and efficient design of roads, bridges, water-conveyance structures, and flood-control projects and for the management of flood plains and flood-prone areas. StreamStats provides a simple, fast, and reproducible method to define drainage-basin characteristics...

Rosa, Sarah N.; Oki, Delwyn S.
Hawaii StreamStats; a web application for defining drainage-basin characteristics and estimating peak-streamflow statistics; 2010; FS; 2010-3052; Rosa, Sarah N.; Oki, Delwyn S.

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Year Published: 2010

Terrigenous sediment provenance from geochemical tracers, south Molokai reef flat, Hawaii

Land-derived runoff is one of the greatest threats to coral-reef health. Identification of runoff sources is an important step in erosion mitigation efforts. A geochemical sediment provenance study was done in uplands and across the adjacent fringing reef on the southeast shore of Molokai, Hawaii, to determine whether sediment runoff originated...

Takesue, R.K.
Terrigenous sediment provenance from geochemical tracers, south Molokai reef flat, Hawaii; 2010; OFR; 2010-1155; Takesue, R. K.

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Year Published: 2010

Rainfall, discharge, and water-quality data during stormwater monitoring, H-1 storm drain, Oahu, Hawaii, July 1, 2009, to June 30, 2010

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. The program is designed to assess the effects of highway runoff and urban runoff collected by the H-1 storm drain on the Manoa-Palolo Drainage Canal. This report summarizes rainfall, discharge, and water-...

Presley, Todd K.; Jamison, Marcael T.J.
Rainfall, discharge, and water-quality data during stormwater monitoring, H-1 storm drain, Oahu, Hawaii, July 1, 2009, to June 30, 2010; 2010; OFR; 2010-1161; Presley, Todd K.; Jamison, Marcael T. J.

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Year Published: 2010

Kiholo Bay, Hawaii, earthquake sequence of 2006: Relationship of the main shock slip with locations and source parameters of aftershocks

We study the source process of the Kīholo Bay earthquake (MW 6.7), which occurred beneath the northwest part of the Island of Hawai‘i on 15 October 2006, and static stress drops of small earthquakes that occurred in 2006 and 2007 around the main shock including aftershocks. We relocate the aftershocks to determine the fault plane from the two...

Yamada, Takuji; Okubo, Paul G.; Wolfe, Cecily
Yamada, Takuji, Okubo, P.G., and Wolfe, C.J., 2010, Kīholo Bay, Hawai‘i, earthquake sequence of 2006: Relationship of the main shock slip with locations and source parameters of aftershocks: Journal of Geophysical Research, v. 115, B08304, 12 p., doi:10.1029/2009JB006657.

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Year Published: 2010

Flood-Frequency Estimates for Streams on Kaua`i, O`ahu, Moloka`i, Maui, and Hawai`i, State of Hawai`i

This study provides an updated analysis of the magnitude and frequency of peak stream discharges in Hawai`i. Annual peak-discharge data collected by the U.S. Geological Survey during and before water year 2008 (ending September 30, 2008) at stream-gaging stations were analyzed. The existing generalized-skew value for the State of Hawai`i was...

Oki, Delwyn S.; Rosa, Sarah N.; Yeung, Chiu W.
Flood-Frequency Estimates for Streams on Kaua`i, O`ahu, Moloka`i, Maui, and Hawai`i, State of Hawai`i; 2010; SIR; 2010-5035; Oki, Delwyn S.; Rosa, Sarah N.; Yeung, Chiu W.

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Year Published: 2010

Effects of Surface-Water Diversion on Streamflow, Recharge, Physical Habitat, and Temperature, Na Wai `Eha, Maui, Hawai`i

The perennial flow provided by Waihe‘e River, Waiehu Stream, ‘Īao Stream, and Waikapū Stream, collectively known as Nā Wai ‘Ehā (“The Four Streams”), made it possible for widespread agricultural activities to flourish in the eastern part of West Maui, Hawai‘i. The streams of the Nā...

Oki, Delwyn S.; Wolff, Reuben H.; Perreault, Jeff A.
Effects of Surface-Water Diversion on Streamflow, Recharge, Physical Habitat, and Temperature, Na Wai `Eha, Maui, Hawai`i; 2010; SIR; 2010-5011; Oki, Delwyn S.; Wolff, Reuben H.; Perreault, Jeff A.

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Year Published: 2010

Coral Ba/Ca records of sediment input to the fringing reef of the southshore of Moloka'i, Hawai'i over the last several decades

The fringing reef of southern Moloka’i is perceived to be in decline because of land-based pollution. In the absence of historical records of sediment pollution, ratios of coral Ba/Ca were used to test the hypothesis that sedimentation has increased over time. Baseline Ba/Ca ratios co-vary with the abundance of red, terrigenous sediment visible in...

Prouty, N.G.; Field, M.E.; Stock, J. D.; Jupiter, S.D.; McCulloch, M.
Coral Ba/Ca records of sediment input to the fringing reef of the southshore of Moloka'i, Hawai'i over the last several decades; 2010; Article; Journal; Marine Pollution Bulletin; Prouty, N. G.; Field, M. E.; Stock, J. D.; Jupiter, S. D.; McCulloch, M.

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Year Published: 2009

A Multitracer Approach to Detecting Wastewater Plumes from Municipal Injection Wells in Nearshore Marine Waters at Kihei and Lahaina, Maui, Hawaii

Municipal wastewater plumes discharging from aquifer to ocean were detected by nearshore wading surveys at Kihei and Lahaina, on the island of Maui in Hawaii. Developed in cooperation with the Hawaii State Department of Health, the survey methodology included instrument trolling to detect submarine groundwater discharge, followed by analysis of...

Hunt, Charles D.; Rosa, Sarah N.
A Multitracer Approach to Detecting Wastewater Plumes from Municipal Injection Wells in Nearshore Marine Waters at Kihei and Lahaina, Maui, Hawaii; 2009; SIR; 2009-5253; Hunt, Charles D. Jr.; Rosa, Sarah N.

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Year Published: 2009

Reconnaissance Assessment of the Potential for Roadside Dry Wells to Affect Water Quality on the Island of Hawai'i

The County of Hawai'i Department of Public Works (DPW) uses dry wells to dispose of stormwater runoff from roads. Recently, concern has been raised that water entering the dry wells may transport contaminants to groundwater and affect the quality of receiving waters. The DPW operates 2,052 dry wells. Compiling an inventory of these dry wells and...

Izuka, Scot K.; Senter, Craig A.; Johnson, Adam G.
Reconnaissance Assessment of the Potential for Roadside Dry Wells to Affect Water Quality on the Island of Hawai'i; 2009; SIR; 2009-5249; Izuka, Scot K.; Senter, Craig A.; Johnson, Adam G.

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Year Published: 2009

Ecological Assessment of Wadeable Streams on O`ahu, Hawai'i, 2006-2007: A Pilot Study

In 2006-07, the U.S. Geological Survey (USGS) Pacific Islands Water Science Center (PIWSC), in cooperation with the Hawai'i Department of Health (HDOH), conducted a pilot study as a participant in the U.S. Environmental Protection Agency's (USEPA) Wadeable Streams Assessment (WSA) program. Forty randomly selected sites on perennial streams on O'...

Wolff, Reuben H.; Koch, Linda A.
Ecological Assessment of Wadeable Streams on O`ahu, Hawai'i, 2006-2007: A Pilot Study; 2009; SIR; 2009-5229; Wolff, Reuben H.; Koch, Linda A.

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Year Published: 2009

Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, July 1, 2008, to June 30, 2009 - Halawa Stream Drainage Basin and the H-1 Storm Drain, Oahu, Hawaii

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. The program is designed to assess the effects of highway runoff and urban runoff on Halawa Stream, and to assess the effects from the H-1 storm drain on Manoa Stream. For this program, rainfall data were...

Presley, Todd K.; Jamison, Marcael T.J.
Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, July 1, 2008, to June 30, 2009 - Halawa Stream Drainage Basin and the H-1 Storm Drain, Oahu, Hawaii; 2009; OFR; 2009-1162; Presley, Todd K.; Jamison, Marcael T. J.

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Digital elevation model of crater and lava lake
May 13, 2021

Halema‘uma‘u DEM May 13, 2021

A helicopter overflight on May 13, 2021, at approximately 11:30 a.m. HST allowed for aerial visual and thermal imagery to be collected of the eruption within Halema‘uma‘u crater at the summit of Kīlauea Volcano. The visual images were used to create a digital elevation model (DEM) of the crater, shown here. The many islands and levees formed at different times during the

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USGS Hawaiian Volcano Observatory geologists conducted an overflight of Kīlauea's summit on the morning of May 13
May 13, 2021

Kīlauea summit overflight - May 13

USGS Hawaiian Volcano Observatory geologists conducted an overflight of Kīlauea's summit on the morning of May 13. Though no incandescence was visible during the overflight, field crews monitoring the ongoing eruption in Halema‘uma‘u from the ground observed a small amount of fluid lava on the surface later in the day. In this aerial photo, the west vent area is in the

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More of Kīlauea's lava lake surface in Halema‘uma‘u crater has solidified in recent weeks, evident in this May 13 aerial view
May 13, 2021

Kīlauea summit overflight - May 13

More of Kīlauea's lava lake surface in Halema‘uma‘u crater has solidified in recent weeks, as is evident in this aerial view taken yesterday, May 13. However, gas emissions and small patches of active lava on the surface indicate that the eruption continues. Most recently, gas emissions were measured as 225 tonnes per day on May 12. The bluish-tinged plume of volcanic gas

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A low, oblique aerial view of the west vent in Halema‘uma‘u at Kīlauea's summit
May 13, 2021

Kīlauea summit overflight - May 13

A low, oblique aerial view of the west vent in Halema‘uma‘u at Kīlauea's summit (upper right) taken during an overflight on May 13. The area of active lava has slowly been decreasing in recent weeks, but not all of the lava lake surface has stagnated. Portions of the lake surface continue to resurface via a process called foundering. During foundering, the dense solidified

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Near Kīlauea Visitor Center, the Ha‘akulamanu trail within Hawai‘i Volcanoes National Park passes through the Sulphur Banks area
May 13, 2021

Kīlauea summit overflight - May 13

Near Kīlauea Visitor Center, the Ha‘akulamanu trail within Hawai‘i Volcanoes National Park passes through the Sulphur Banks area. Fumaroles in this area emit different sulfur gases, including sulfur dioxide (SO2) and hydrogen sulfide (H2S), and are sampled approximately every three months by USGS Hawaiian Volcano Observatory gas geochemists to track

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USGS Hawaiian Volcano Observatory geologists observed fluid lava on the surface of the lava lake in Halema‘uma‘u, at the summit
May 13, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—May 13, 2021

USGS Hawaiian Volcano Observatory geologists observed fluid lava on the surface of the lava lake in Halema‘uma‘u, at the summit of Kīlauea, while monitoring the eruption on May 13. Two areas of ponded lava exhibited foundering, during which more-dense solidified crust sinks into the lava lake and is replaced by less-dense liquid lava from below. This photo shows the

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The area of solidified crust at the surface of Halema‘uma‘u's lava lake, has been growing over the past several weeks
May 13, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—May 13, 2021

The area of solidified crust at the surface of Halema‘uma‘u's lava lake, at the summit of Kīlauea, has been growing over the past several weeks. This may make it seem that the eruption is over but lava continues to be supplied to the lava lake from below. With National Park Service permission, USGS Hawaiian Volcano Observatory geologists observe this eruption from within

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The eruption in Halema‘uma‘u, at the summit of Kīlauea, continues
May 13, 2021

Halema‘uma‘u lava lake, Kīlauea summit eruption—May 13, 2021

The eruption in Halema‘uma‘u, at the summit of Kīlauea, continues. Gas emissions, last measured on May 12, were 225 tonnes per day. This photo, taken on May 13, shows the bluish-tinged plume of volcanic gas being emitted from the western vent complex within Halema‘uma‘u crater. USGS image by K. Mulliken.

A wide view of Halema‘uma‘u from the western crater rim, at the summit of Kīlauea
May 12, 2021

Halema‘uma‘u eruption activity on May 12, 2021 — Kīlauea summit

A wide view of Halema‘uma‘u from the western crater rim, at the summit of Kīlauea. The west vent (lower left) continues to supply lava into the lake through a submerged inlet. Much of the western active lava lake surface has crusted over in the last few weeks as the effusion rate remains low. USGS photograph taken by D. Downs on May 12, 2021.

A close up view of the western portion of the lava lake within Halema‘uma‘u, at Kīlauea summit
May 12, 2021

Halema‘uma‘u eruption activity on May 12, 2021 — Kīlauea summit

A close up view of the western portion of the lava lake within Halema‘uma‘u, at Kīlauea summit. A weak gas plume is emitted from the western fissure vent (left), with the most recent sulfur dioxide emission rate measured at 150 tonnes per day on May 11. USGS photograph taken by D. Downs on May 12, 2021 from the west rim of Halema‘uma‘u.

On the west side of Mauna Loa summit, a campaign GPS (center-right) measures its location for a period of 2–3 days
May 11, 2021

Mauna Loa campaign GPS survey—May 11, 2021

On the west side of Mauna Loa summit, a campaign GPS (center-right) measures its location for a period of 2–3 days. This site has been occupied every year by helicopter since 1994. Mauna Kea, Hualālai and Haleakalā can be seen in the distance. USGS photo taken by S. Conway on May 11, 2021, during the 2021 Mauna Loa GPS campaign survey. 

Color map of lava lake at volcano summit
May 7, 2021

May 7, 2021—Kīlauea summit eruption contour map

This map of Halema‘uma‘u at the summit of Kīlauea shows 20 m (66 ft) contour lines (dark gray) that mark locations of equal elevation above sea level (asl). The map shows that the lava lake has filled 229 m (751 ft) of the crater, to an elevation of 746 m (2448 ft) asl since the eruption began on December 20, 2020. Contour lines highlighted in green, purple, and blue mark

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A rainy view from the western rim of Halema‘uma‘u, at Kīlauea summit
April 30, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (744 ft) deep this morning, April 30. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

The lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, remains active but the active surface lava has diminished
April 29, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (744 ft) deep this morning, April 29. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

A view of the lake this afternoon from the Halema‘uma‘u Crater rim,...
April 29, 2021

May 3rd marks three years since the start of the devastating lower East Rift Zone eruption of Kīlauea. In 2018, rising summit lava lake levels, caused by building magmatic pressure, culminated in a large eruption on the lower flank which then abruptly drained the summit lava lake and initiated crater collapse.

The lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, remains active
April 28, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (744 ft) deep this morning, April 28. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

On Monday, April 26, 2021, lava continued to flow from the western vent into the active lava lake in Halema‘uma‘u Crater
April 27, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (744 ft) deep this morning, April 27. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Color animated gif of lava lake rise
April 23, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (744 ft) deep this morning, April 23. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Color photograph of instrument and mountain
April 22, 2021

Gravimeters, essentially extremely precise pendulums, can measure a change in the force of gravity to one-in-one billionth of the force you feel every day. This force varies based on the distance and the amount of mass between the instrument (or you) and the center of the Earth.

Color photograph of lava lake
April 21, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 226 m (741 ft) deep this morning, April 21. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

An HVO geologist surveys the lava lake from the eastern rim of Halema‘uma‘u Crater
April 19, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 226 m (741 ft) deep this morning, April 19. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

View looking southwest along the Southwest Rift Zone of Kīlauea Volcano.
April 15, 2021

It is no secret that the Island of Hawaiʻi is home to fantastic volcanic features, many of which have been created during eruptions of Kīlauea, Mauna Loa, and Hualalai since 1800. 

A close-up view of the western fissure within Halema‘uma‘u at the summit of Kīlauea Volcano
April 15, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (745 ft) deep this morning, April 15. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

View from the south rim of Halema‘uma‘u shows the perched lava lake
April 14, 2021

Kīlauea's summit eruption continues on the Island of Hawai‘i; Halema‘uma‘u west vent erupts lava into the lava lake, which was 227 m (745 ft) deep this morning, April 14. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

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